Buggy code:
public class SchoolInfoProvider extends AUDataModelProvider { private static int numDeletes = 0 ; private static HashMap < String , SchoolInfoType > schools = null ; private ObjectFactory dmObjectFactory = new ObjectFactory ( ) ; public SchoolInfoProvider ( ) { } @ Override public Object retrievByPrimaryKey ( String resourceID , SIFZone zone , SIFContext context , RequestMetadata metadata ) throws IllegalArgumentException , PersistenceException { } @ Override public Object createSingle ( Object data , boolean useAdvisory , SIFZone zone , SIFContext context , RequestMetadata metadata ) throws IllegalArgumentException , PersistenceException { } @ Override public boolean updateSingle ( Object data , String resourceID , SIFZone zone , SIFContext context , RequestMetadata metadata ) throws IllegalArgumentException , PersistenceException { } @ Override public boolean deleteSingle ( String resourceID , SIFZone zone , SIFContext context , RequestMetadata metadata ) throws IllegalArgumentException , PersistenceException { } @ Override public Object retrieve ( SIFZone zone , SIFContext context , PagingInfo pagingInfo , RequestMetadata metadata ) throws PersistenceException , UnsupportedQueryException { } @ Override public List < CreateOperationStatus > createMany ( Object data , boolean useAdvisory , SIFZone zone , SIFContext context , RequestMetadata metadata ) throws IllegalArgumentException , PersistenceException { } @ Override public List < OperationStatus > updateMany ( Object data , SIFZone zone , SIFContext context , RequestMetadata metadata ) throws IllegalArgumentException , PersistenceException { <START_BUG> if ( data instanceof StudentCollectionType ) { <END_BUG> logger . debug ( ( ( ( "Update<seq2seq4repair_space>schools<seq2seq4repair_space>(Bulk<seq2seq4repair_space>Operation)<seq2seq4repair_space>for<seq2seq4repair_space>" + ( getZoneAndContext ( zone , context ) ) ) + "<seq2seq4repair_space>and<seq2seq4repair_space>RequestMetadata<seq2seq4repair_space>=<seq2seq4repair_space>" ) + metadata ) ) ; SchoolCollectionType schools = ( ( SchoolCollectionType ) ( data ) ) ; ArrayList < OperationStatus > opStatus = new ArrayList < OperationStatus > ( ) ; int i = 0 ; for ( SchoolInfoType school : schools . getSchoolInfo ( ) ) { if ( ( i % 3 ) == 0 ) { opStatus . add ( new OperationStatus ( school . getRefId ( ) , 404 , new sif3 . common . ws . ErrorDetails ( 404 , ( ( "School<seq2seq4repair_space>with<seq2seq4repair_space>GUID<seq2seq4repair_space>=<seq2seq4repair_space>" + ( school . getRefId ( ) ) ) + "<seq2seq4repair_space>does<seq2seq4repair_space>not<seq2seq4repair_space>exist." ) ) ) ) ; } else { opStatus . add ( new OperationStatus ( school . getRefId ( ) , 200 ) ) ; } i ++ ; } return opStatus ; } else { throw new IllegalArgumentException ( ( "Expected<seq2seq4repair_space>Object<seq2seq4repair_space>Type<seq2seq4repair_space>=<seq2seq4repair_space>SchoolCollectionType.<seq2seq4repair_space>Received<seq2seq4repair_space>Object<seq2seq4repair_space>Type<seq2seq4repair_space>=<seq2seq4repair_space>" + ( data . getClass ( ) . getSimpleName ( ) ) ) ) ; } } @ Override public List < OperationStatus > deleteMany ( List < String > resourceIDs , SIFZone zone , SIFContext context , RequestMetadata metadata ) throws IllegalArgumentException , PersistenceException { } @ Override public ModelObjectInfo getSingleObjectClassInfo ( ) { } @ Override public ModelObjectInfo getMultiObjectClassInfo ( ) { } private String getZoneAndContext ( SIFZone zone , SIFContext context ) { } }

Fix:
if ( data instanceof SchoolCollectionType ) {